#18223A
Closest named color: Oxford Blue (#1B263B). oklch(25.6% 0.048 266), rgb(24, 34, 58).
Aa
White text reads best on this color (15.80:1).
About this color
#18223A is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.048 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.015 away. White text reads best on it, at 15.80:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.80:1 |
Values
| HEX | #18223A |
| RGB | rgb(24, 34, 58) |
| HSL | hsl(222, 41%, 16%) |
| OKLCH | oklch(25.6% 0.048 266) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #18223A | 15.80:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #18223A | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #18223A text on white | 15.80:1 | AAA | Lc 102.7 | Preferred for body text |
| #18223A text on black | 1.32:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AFC1E6
oklch(81% 0.056 264.7)
-
Step 400
400
#869FDA
oklch(70.6% 0.091 266.4)
-
Step 500
500
#6887D0
oklch(63.2% 0.116 265.7)
-
Step 600
600
#506FBD
oklch(55.5% 0.127 266.1)
-
Step 700
700
#415DA3
oklch(49.2% 0.117 265.8)
-
Step 800
800
#364C84
oklch(42.7% 0.097 266.2)
-
Step 900
900
#2F406A
oklch(37.8% 0.075 266.2)
-
Step 950
950 (this color)
#18223A
oklch(25.6% 0.048 266)
#18223A with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #19243B | 0.007 |
| Deuteranopia (no green cones) | #152139 | 0.006 |
| Tritanopia (no blue cones) | #09272B | 0.042 |
| Achromatopsia (no color) | #232323 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18223A
#18223A
oklch(25.6% 0.048 266)
- #2D2104
#2D2104
oklch(25.6% 0.047 86)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18223A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.015
- Dark #1B2431 ΔE 0.021
- Jet #212529 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.051
- Gunmetal #293241 ΔE 0.063
- Navy Blue #001146 ΔE 0.071
- Marine #042E60 ΔE 0.074
Use #18223A in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.